I had tanks do that as I was healing on my WHM, not so hard to fluid aura, sleep, save swiftcast for stoneskin, clutch heal/cc, or last hit damage and get it done with, use regen and small heals. If worse comes to worse I'd just kite tank the other adds while dpsing and healing.
Instead of sitting there doing nothing but whine hoping for the issue to magically resolve itself. God forbid the existence of ingenuity and situational awareness.
The expectations people have now compared to when MMO's first started is pretty hilarious. Duty Finder is not Major League Gaming and portions of the community take it to the comic book guy extremes by going to town on someone because they can't do what you believe should be standard which is elitist no matter how you want to spin it. You can go on and claim you're giving advice but you are not since you are only typing because it was an inconvenience.
Players want hard content and it has become the norm in MMO's now. Yet to whine when you have to deal with bad players because content now requires a certain threshold of effort is pretty pointless and it's the reason why a small percentage ever ends up downing end game content. Instead of whining and doing nothing why don't you follow that "advice" and put effort into being better and handling the situation on your own instead of relying on others you obviously can't rely on? Since you already claim to be so well versed in the mechanics of the game. How about effort into forming your own groups if the idea of being paired with bads ails you? Two things which ainn't happening and all I see is people venting and making sob stories.
The venting I get but you can resolve it faster than trying to give bads advice at all. The sob stories however aren't needed and are pointless since using DF equates to being paired up with strangers that will lead to an array of skill levels ranging from bad, on horrible internet to good and geared.